Improvement in steam-boilers



UNITED "STATES AWVM. MONT STORM, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND 1B.

Y CHARLTON MITCHELL, OF SAME PLACE.

PATENT OFFICE.

IMPROVEM ENT lN STEAM-BOILERS.

Specification forming part of Letters Patent No. 49,199, dated August 1, 1565.

To all whom it may concern:

Be it known that I,W1LLIAM MONT STORM, of the city, county, Iand State of New York, have invented a new and usei'ul Improvement in Steam-Boilers, principally intended for portable purposes, and of which the following specification, taken in connection with the accompanying drawings, embraces a full and l'air description.

Figure 1 shows an elevation or side view of my boiier, (which, as will be seen, is of the horizontal tubular-flue class,) having two ceny tral furnaces divided by a water-leg or midfeather, C, each portion of the boiler from the middle (meaning on each side of a line drawn vertically through it) being a counterpart of the other. In Fig.1 the boiler is shown broken off, exhibiting a central vertical sectionalview on the one part and an exterior view of the counterpart. Fig. 2 is an end view, the details of which will be hereinafter explained. Fig. 3 is a cross-section through a: x of Fig. 1.

A A, constituting the shell of the boiler, isa simple cylinder. Y B B (dotted in) are the tireboxes, with the water-space C between them.

The grate d, Fig. l, in lieu of being extended quite to the sides of the lire-boxes, is supported upon independent partition-walls e e, for a purpose presently to be explained.

The principal objects I desire to attain are, rst, great heating-surface in small space, combined with facility for cleansing and repair; second, a form involving the greatest strength with theleast number of internal braces; third, free circulation of the water and dry steam.

I desire to make this boiler adaptable to the combustion as fuel ot petroleum or highly bituminous coal, for which purpose it is necessary to supply a warm or hot draft. In view of this I insert several tubes, x x, (see Figs. 1, 2, and 3,) that communicate from the exterior of each end of the boiler (and with the open air) at one of their extremities, while the opposite extremities of said tubes .r x cornlnunicate with the space between the walls e e, that bound the grate cl and the walls of the re-box. In burning ordinary coal--say anthracite-this would be of little avail, or unnecessary, as anthracite gives olf but little gas during its ignition, the. tubes a" w being applied l'or the speci-.1l purpose of supplying a heated supporter of combustion to the more volatile vapors and gases that usually escape unutilized wht-1i petroleum or.l1ighly bituminand cohesive mineral fabric would `be applied g when a Huid-such as petroleum-was used as a fuel, such fuel being fed to such substitute for a grate from a proper] y-arran ged reservoir, the supply being regulated automatically in some one of several ways that would be readily conceived by any expert-such as, `for in stance, relates to and is governed by the temperature or the pressure of the steam within the boiler. K

To embrace great heating-surface in small space the use of tubes has been found most available in practice. As will be at once understood, the smaller the tubes and the closer together more heating-surface can be had in a given space; but as circulation and the separation ot' the steam from the water render necessary iu practice a space between such tubes, (not theoretically necessary,) so in praetice, as is well known, it is found that for the passage of the gaseousproducts of combustion through a tube the smaller the tube the shorter it must be, or it will choke; hence, -if I had a single furnace at the end of my boiler and the products of combustion had to pass through such small tubes, as Ican by its shown arrange-` ment employ, it could not possibly operate satisfactorily.

A single central furnace would, in a measure, overcome the practical objections pointed out; but there would be no absolute ability to make the hot products of combustion iiow with equality through the counterpart series ot' tubes; hence I employ the double central furnace B B', sepa-rated by the water-space C, increasing thereby my iirevsurface, strengthening the walls ot' the furnace, supplying a central circulation-passage for the water, and having the Well-known advantage of trimming each fire alternately, and thus keeping steady steam.

A damper of any convenient location or form can be applied as relating to the" tubes x' fr',

or, of course, they can be dispensed with in special cases.

For convenience ot cleaning or replacement of any of the flue-tubes f, I have a false head or tampion, g, at each end of my boiler, that is removable, and which is hollow, and thraugh Which the. water of the boiler circulates, and from which any steam therein formed may escape, said false head g being connected with the main body of the boiler by the conduits h h. 'Io remove g it is only necessary to unscrew the tap-bolts that bind h h to the boiler, those bolts that bind said conduits to g notrequiring removal.

As will be readily understood by inspection of the drawings, the products of combustion pass from .the furnace B through the tubesf into the smokebox i, thence through the two comparatively large ues J, that, being located in the steam-space, help to dry the steam, and which are connected (see Fig. l) with the chimney K, which passes centrally through the steam-drum L.

I have anticipated putting a tube or passage, as at m m, properly t'hrottled to prevent the escape of smoke, longitudinally through the steamdrum and chimney, so that I could locate upon the boiler an engine at one end and a pump at the other end.

Having now described my improved steam' boiler, what I claim is- 1. The relative arrangement of the parts of my steam-boiler substantially as follows, viz: in a cylindrical horizontal shell, the arrangement oftwoindependentfurnaces located at its middle, with grate-bars running transversely to its length, said furnaces being separated by a water space or leg, and their products ot'combustion respectively passing right and left through tlues (preferably small tubes) to chambers i t', and thence through some proper conduit to their final exit, all substantially as described.

2. Being aware that hollow stay-bolts are not new, I disclaim such; but I claim, in conjunction With the other general arrangement of the parts of this boiler, the application of a series of auxiliary draft-heating tubes running the entire length ot' the horizontal shell from its end to its furnaces, respectively, in the manner and for the reason given.

3. The hollow h'ead or tam pion, with its conduits, for circulation, substantiallyin the manner and for the purposes described.

4. The application of the sleeve m 'm through the steam-drum and chimney, for the objects described.

WM. MONT STORM.

Witnesses:

JAs. S. WIGHTMAN, C. J. FERGUSON. 

